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1/2 to 1/4 Impact Adapter - This 1/2 to 1/4 impact adapter is mainly used with impact drivers or hand ratchets, torque wrench and impact wrench, also available for other 1/2" drive tools. Easy to drill screws into wall or wood by using this adapter. Suitable for vehicle maintenance or house decoration.Standard Interface - The 1/2 to 1/4 impact adapter is high torque and not easy to loose. And the hexagonal diameter of socket adapter is 0.63cm(0.24inch), the square diameter is 1.3cm(0.51inch). Please note the size whether fix your needs before your purchasing. The concave four-corner design increases the contact surface strength and evenly distributes it to the bolt head, reducing wear.Spring Ball Designed - The spring ball detent of 1/2 to 1/4 socket adapter can connect to socket firmly to prevent it from being dropped for undisturbed work, improving accuracy and safety when working on your car or home improvement.Premimu Material - The drill bit adapter is made of durable material, which is strong and stable, resistance to high temperature, has good impact absorption performance and not easy to break. Can be used for a long time.Wide Application - Drill socket adapter ideal for auto mechanics, carpenters, motorcycle mechanics and so on. It is a useful accessory can help you to improve the work efficiency and save your time. The package includes 2 pieces of drill bit adapter, can meet your needs in daily life. If you have any problems during use this impact wrench adapter, please contact us at any time.